refactor(install): drop llmfit, pick model from native RAM heuristic - #25
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The llmfit Rust binary failed to execute on Termux ("cannot execute:
required file not found") because the GitHub release uses the standard
Linux dynamic loader path, which doesn't exist under Termux's prefix.
The binary also added a ~16MB checked-in artifact and a hard dependency
on a third-party GitHub release for what is essentially a small lookup
table.
- Remove `_install_llmfit` entirely and the cached `./llmfit` binary.
- Add `_detect_total_ram_mb` (reads /proc/meminfo on Linux/WSL/Termux,
falls back to `sysctl hw.memsize` on macOS) and
`_recommend_model_for_hardware` (RAM tiers → gemma3:1b / gemma3:4b /
llama3.1:8b / qwen2.5:14b / qwen2.5:32b).
- Rename `install_llmfit_and_select_model` → `select_and_pull_llm_model`
and honour GATHM_OLLAMA_MODEL env var and $HOME/.gathm/model as
overrides before falling back to the heuristic.
Works on every platform the rest of the installer already supports,
with no external download and no ABI brittleness.
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The llmfit Rust binary failed to execute on Termux ("cannot execute: required file not found") because the GitHub release uses the standard Linux dynamic loader path, which doesn't exist under Termux's prefix. The binary also added a ~16MB checked-in artifact and a hard dependency on a third-party GitHub release for what is essentially a small lookup table.
_install_llmfitentirely and the cached./llmfitbinary._detect_total_ram_mb(reads /proc/meminfo on Linux/WSL/Termux, falls back tosysctl hw.memsizeon macOS) and_recommend_model_for_hardware(RAM tiers → gemma3:1b / gemma3:4b / llama3.1:8b / qwen2.5:14b / qwen2.5:32b).install_llmfit_and_select_model→select_and_pull_llm_modeland honour GATHM_OLLAMA_MODEL env var and $HOME/.gathm/model as overrides before falling back to the heuristic.Works on every platform the rest of the installer already supports, with no external download and no ABI brittleness.